杨梅叶片矿质营养及对土壤重金属的富集效应

以8年生的杨梅叶片为试材，采用微波消解法处理样品，电感耦合等离子体质谱法(ICP-MS)测定杨梅叶片矿质营养及土壤元素含量，探讨杨梅适宜营养指标，为杨梅合理施肥提供科学依据。结果表明， N、 Ca和K元素是杨梅叶片中的主要营养元素，含量均高于7.048 g·kg-1；杨梅叶片中B的含量(35.82 mg·kg-1)显著高于土壤中B的含量(18.4 mg·kg-1)，为满足杨梅对B的需求，栽培过程中需补充B肥；杨梅叶片中含有丰富的Fe、 Mn和Zn等微量元素， B含量与Fe含量呈显著正相关， Mn含量与Fe、 Zn含量均呈负相关。杨梅对土壤中Zn、 Cu、 Cr和Ni等重金属元素有一定的富集效应。

Composition of mineral nutrition and heavy metals accumulation in the leaves of Myrica rubra

The content of mineral nutrition and the characteristics of heavy metals accumulation in the leaves of Myrica rubra were assessed by inductively coupled plasma mass spectrometry ( ICP-MS) . The results showed that N, Ca and K, major nutrients in the leaves of M. rubra, were higher than 7.048 g·kg-1. The content of B element, being up to 35.82 mg·kg-1 was significantly higher than that of the soil (18.4 mg·kg-1). These result indicated that enough B fertilizer was artificially added on the managing water and fertilizer for M. rubra. The leaves of M. rubra contained abundant microelements of Fe, Mn and Zn. The significantly correlation between B and Fe was discovered in the leaves. Mn was negatively correlated with Fe and Zn. The heavy metals of Zn, Cu, Cr and Ni in soil were enriched in leaves.